i've been working with secretary napolitano and find the way to provide jammers to local police. as far as those with detonators, there is no, other than having more dogs, more surveillance and that appears to what happened here. if it was a detonator, only way to stop there, if there were more police dogs constantly screening the area and, again, we, you know, when there is after-action report from the boston police department we'll have a better idea what happened, how those ieds got there. bill: yeah. understood. did you say jammers? i want to be clear on that, is that the word you used? >> jammers. yeah, jammers can be used against remote controls. bill: what would they do? >> they would prevent an ied going off. it would prevent the person trying to set it off by remote control, it would prevent that from happening. we used them in afghanistan. we used them in iriraq. bill: yeah, i asked that because apparently cell phone service and e-mail service was down several hours month afternoon. were jammers used in the boston after the attack it is. >> i'm not sure. could have been